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FIX: High CPU usage when you query a binary large object column by using the NOLOCK hint in SQL Server 2008 R2 or in SQL Server 2012Article ID: 2752432 - View products that this article applies to. On This PageSymptomsAssume that you query a binary large object (BLOB) column in Microsoft SQL Server 2008 R2 or in Microsoft SQL Server 2012 on a computer that has multiple CPUs. The query uses the NOLOCKhint. In this situation, you experience high CPU usage on the computer. Note This issue is more likely to occur if the computer has 16 or more CPUs installed. CauseThis issue occurs because a spinlock backoff algorithm is not efficient. ResolutionCumulative update informationCumulative Update 2 for SQL Server 2012 SP1The fix for this issue was first released in Cumulative Update 2. For more information about how to obtain this cumulative update package for SQL Server 2012 SP1, click the following article number to view the article in the Microsoft Knowledge Base:2790947 Note Because the builds are
cumulative, each new fix release contains all the hotfixes and all the security fixes
that were included with the previous SQL Server 2012 SP1 fix release. We recommend that
you consider applying the most recent fix release that contains this hotfix. For more
information, click the following article number to view the article in the Microsoft
Knowledge Base:
(http://support.microsoft.com/kb/2790947/
)
Cumulative update package 2 for SQL Server 2012
Service Pack 12772858
(http://support.microsoft.com/kb/2772858/
)
The SQL
Server 2012 builds that were released after SQL Server 2012 Service Pack 1 was
releasedCumulative Update 5 for SQL Server 2012The fix for this issue was first released in Cumulative Update 5. For more information about how to obtain this cumulative update package for SQL Server 2012, click the following article number to view the article in the Microsoft Knowledge Base:2777772 Note Because the builds are cumulative, each new fix release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2012 fix release. We recommend that you consider applying the most recent fix release that contains this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/2777772/
)
Cumulative update package 5 for SQL Server 20122692828
(http://support.microsoft.com/kb/2692828/
)
The SQL Server 2012 builds that were released after SQL Server 2012 was releasedSQL Server 2008 R2 Service Pack 2The fix for this issue was first released in Cumulative Update 3. For more information about how to obtain this cumulative update package for SQL Server 2008 R2 Service Pack 2, click the following article number to view the article in the Microsoft Knowledge Base:2754552 Note Because the builds are cumulative, each new fix release contains all the hotfixes and all the security fixes that were included with the previous SQL Server 2008 R2 Service Pack 2 fix release. We recommend that you consider applying the most recent fix release that contains this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/2754552/
)
Cumulative update package 3 for SQL Server 2008 R2 Service Pack 22730301
(http://support.microsoft.com/kb/2730301/
)
The SQL Server 2008 R2 builds that were released after SQL Server 2008 R2 Service Pack 2 was releasedStatusMicrosoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. WorkaroundTo work around the issue, use one of the following methods:
PropertiesArticle ID: 2752432 - Last Review: January 24, 2013 - Revision: 5.0 Applies to
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